3D Printing/Additive Manufacturing
A manufacturing technology more specifically and technically referred to as additive manufacturing.
Common forms include:
Fused Deposition Modeling™ (FDM)/Fused Filament Fabrication (FFF)
A manufacturing method that typically uses a plastic filament and a hotend to melt said filament to build up parts layer by layer. The most common form of 3D printing with plastic.
Stereolithography (SLA) Printing
Another popular form of 3D printing that uses UV curable resin and a UV laser with mirror galvanometers to cure single layers of the resin on a build plate and build up the part from the clear bottom of a tank. The parts need to be cleaned and cured after printing to fully cure the partially cured resin.
See Also
Masked-Stereolithography (MSLA)
Very similar to SLA except that it uses a photo-mask, typically an LCD panel, to mask a UV lamp to cure a whole layer of resin at once instead of scanning with a UV laser. In recent years, more popular than classic SLA since it is much faster.
Powder Bed Fusion (DMLS, SLS, SLM, MJF, & EBM)
Directed-Energy Deposition (DED)
A family of deposition methods for 3D printing, typically in metal.